Nah... You already have the tough stuff under your belt. Your domain is already working!!! Yay!
Some good stuff for you to read. Grab a cup of tea (or the good stuff if you prefer - wink, wink) and have at it! Installing WordPress I'm not familiar with Free Hostia, but I'm sure others have covered similar issues. Take a peek and see if anything in these results turn out to be helpful.
"how to" wordpress free hostia
There might even be some Videos in there.
Take a little time and power through some of that info, and you'll come out like a champ. It'll slowly start to make more sense. The first time is always a little confusing.